Demountable rim



W. H. ROUNDS.

DEMOUNTABLE RIM.

APPLICATION FILED Dsc.4,1919.

1 44, 2 l 2 Patented J une 22, 1920.

3 '9 Lzvenor.'

Wflll- Jf. Rounds,

/ y Axy.

UNITED sTATi-:s

PATENT OFFICE.

DEMOUNTABLE RIM.

To all whom t may concern.' f y Be it known that I, WiLLIAM IiIQRoUNDs, a citizen of the United States, a resident of Sioux Falls, South Dakota, have invented certain new and useful Improvements in Demountable Rims, of which the following is ak struction and arrangement and combination of parts hereinafter described and defined by the appended claims.

An embodiment of my invention is illustrated in the accompanying drawings in which- Figure 1 is a side elevation of a wheel and demountable rim embodying my invention, partly broken away.

Fig. 2 is a line 2-2 of Fig. 1, and

Fig. 3 is a fragmentary detail plan view of the inner face of the demountable rim with certain wheel rim parts indicated by dot and dash lines.

f Fig. 4 is a fragmentary detail view.

Referring by reference characters to this drawing, the numeral 1, designates a wheel which may be of the ordinary or any desired construction provided with a felly 2, and an outer peripheral felly band 2x, Which is of plain cylindrical form except for the holding lugs hereinafter described.

The removable or demountable rim is indicated at 3 and may have its channel portion of any desired form orconstruction designed to receive the ordinary clencher or straight side tire as desired. In the present instance I have for convenience and simplicity of illustration shown it as a clencher rim designed to receive the ordinary clencher tire. The periphery of the wheel rim is provided with a plurality of equally spaced holding lugs, 2n which are provided with notches or recesses a designed to be engaged by corresponding projections a of similar lugs or holding members 38L formed Specification of Letters Patent.

transverse sectional view onv Patented June 22,1920.

Application filed December 4, 1919. Serial No. 342,390.

orotherwise suitably secured to the inner peripheral face of the demountable rim. The demountable rim is provided with a locking projection or fin 4, which is of comparatively thin or web shape and which is designed to fit within a corresponding recess orslot 2b in the wheel rim, which slot is 'elongated to permit of the demountable rim being given a rotary movement relative to the wheel rim suilicient to permit the projections and recesses of the lugs on the respective parts to be brought into interlocking engagement. These lugs and recesses are relatively tapered or wedge shape as shown, so that such Lrelative rotary vor circumferential movement forces them into wedgi'ng engagement and securely holds the demountable rim against movement in a lateral direction. y

The demountable rim is provided with an opening 3c for the valve stem which latter is indicated by dotted lines at 5, (the tire not being shown) and a similar valve stem opening 2c is formed in the wheel rim adjacent the slot which receives the locking projection or fin 4. The opening 2C is likewise elongated to permit the circumferential movement of the demountable rim carrying the inflated tire with' relation to the wheel rim, and the opening 2C may be, as a matter of fact, and preferably is, formed as a widened out continuation of the fin receiving slot or opening 2b. In the application of .the demountable rim to the wheel the valve stem and locking fin are first inserted in the slots or openings provided therefor, and the swung over the wheel rim until the coacting recesses and projections of the holding lugs are in alinementwhereupon they are engaged by the circumferential movement hereinbefore described;

To prevent accidental circumferential movement of the demountable rim on the wheel rim when the wheel is in use on the vehicle, the locking fin is provided with a hole m and the wheel rim with a corresponding hole and a bolt 6 is passed through these alining holes to lock the parts against relative circumferential movement.

The wheel rim is provided on one side with a peripheral flange 7 designed to overlie the corresponding side face of the demountable rim and serve as a stop to limit the movement in assembling and thus insure alinement of the holding lugs, and also to `VVopposite side of the demountable rim is then l exclude `dirt from the joint between the wheel rim and demountable rim. On the opposite side` oi the wheel the demountable run is provided with an annular inwardly projecting flange 9 designed to overlie the face ol the wheel rim in close Contact therewith and thus provideufor the exclusion of dirt, the face of the Wheel rim being preferably recessed to receive the flange as shown. A

As a further means of insuring against accidental circumferential movement of the demountable rim on the wheel rim, the latter is provided with a transverse groove BZ which is designed to be engaged by an L shaped locking. member of key l0, the angular end of which is provided with an eye or i opening` 1W designed to have the locking bolt passed therethrough.

The delnountable rim may be provided with projections 3y which may be tapped by a hammer to start the circumferential Inovement when theriln is to be removed. l

Having thus described my inventiomwhat I claim isl. In combination, awheel rim, having a rim having spaced lugs provided with cir-` cunrerentially disposed interengaging projections and recesses, said `demountable rim having a transverse groove adjacent said iin, and an L-shapedlocking key having a part resting in said groove and having a part overlying the wheel rim provided with a bolt hole alining with bolt holes in the wheel rim and locking fin, and a bolt engaging said bolt holes.

In testimony whereof I affix my signature.

lVILLIAM HENRY ROUNDS. 

